Ofdma-based multiplexing of uplink control information

ABSTRACT

Methods and apparatus are described for transmitting uplink control information (UCI) over an OFDMA-based uplink. In some embodiments, UCI symbols are mapped to resource elements (REs) in the time/frequency resource grid to maximize frequency diversity. In some embodiments, UCI is mapped in a manner that takes into account channel estimation performance by mapping UCI symbols to those REs that are closest (in terms of OFDM subcarriers/symbols) to REs that carry reference signals.

PRIORITY CLAIM

This application is a continuation of U.S. patent application Ser. No.15/573,314, filed Nov. 10, 2017, which is a U.S. National Stage Filingunder 35 U.S.C. 371 from International Application No.PCT/US2016/025569, filed on Apr. 1, 2016, and published as WO2017/019132 on Feb. 2, 2017, which claims priority to United StatesProvisional Patent Application Serial Nos. 62/199,058, filed Jul. 30,2015 and 62/269,363, filed. Dec. 18, 2015, each of which are herebyincorporated by reference herein in their entirety.

TECHNICAL FIELD

Embodiments described herein relate generally to wireless networks andcommunications systems. Some embodiments relate to cellularcommunication networks including 3GPP (Third Generation PartnershipProject) networks, 3GPP LTE (Long Term Evolution) networks, and 3GPPLTE-A (LTE Advanced) networks, although the scope of the embodiments isnot limited in this respect.

BACKGROUND

In Long Term Evolution (LTE) systems, a mobile terminal (referred to asa User Equipment or UE) connects to the cellular network via a basestation (referred to as an evolved Node B or eNB). Current LTE systemsutilize orthogonal frequency division multiple access (OFDMA) for thedownlink (DL) and a related technique, single carrier frequency divisionmultiple access (SC-FDMA), for the uplink (UL). For next generationradio access technologies, o OFDMA-based multicarrier modulation is anattractive uplink air interface because it allows for simplifiedreceiver structures and enhanced interference cancelation schemes whenthe downlink air interface is also OFDMA based. However, a newmulticarrier modulation scheme in the uplink also requires a redesign ofresource element (RE) mapping when uplink control information (UCI) istransmitted together with data over a shared uplink channel. Describedherein are methods and associated apparatuses to transmit uplink controlinformation in an uplink shared channel based upon OFDMA waveforms.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an example UE and eNB according to some embodiments.

FIG. 2 illustrates a PUSCH with symmetric UL/DL and a PUSCH with SC-FDMAaccording to some embodiments.

FIG. 3 illustrates an example of a DMRS pattern for different numbers oflayers according to some embodiments.

FIG. 4 illustrates RE mapping for UCI with symmetric UL/DL waveformaccording to some embodiments.

FIG. 5 illustrates RE numbering of UCI resources on OFDM symbolscontaining DMRS for an example DMRS pattern according to someembodiments.

FIG. 6 illustrates RE numbering of UCI resources on OFDM symbolscontaining DMRS for an example DMRS pattern with different mapping rulesper slot according to some embodiments.

FIG. 7 illustrates an example of a UCI mapping based on distance to DMRSsymbols according to some embodiments.

FIG. 8 illustrates an example of a DMRS pattern and associated UCImapping based on proximity to DMRS REs according to some embodiments.

FIG. 9 shows an example of a transmission-layer dependent DMRS patternfor subframes with time-multiplexed PUSCH and PUCCH regions according tosome embodiments.

FIG. 10 shows an example of a transmission-layer independent DMRSpattern for subframes with time-multiplexed PUSCH and PUCCH regionsaccording to some embodiments.

FIG. 11 shows an example of a DMRS pattern for subframes withtime-multiplexed PUSCH and PUCCH regions according to some embodiments.

FIG. 12 illustrates an example of a user equipment device according tosome embodiments.

FIG. 13 illustrates an example of a computing machine according to someembodiments.

DETAILED DESCRIPTION

FIG. 1 illustrates an example of the components of a UE 400 and a basestation or eNB 300. The eNB 300 includes processing circuitry 301connected to a radio transceiver 302 for providing an air interface. TheUE 400 includes processing circuitry 401 connected to a radiotransceiver 402 for providing an interface. Each of the transceivers inthe devices is connected to antennas 55.

The physical layer of LTE is based upon orthogonal frequency divisionmultiplexing (OFDM) for the downlink and a related technique, singlecarrier frequency division multiplexing (SC-FDM), for the uplink. InOFDM/SC-FDM, complex modulation symbols according to a modulation schemesuch as QAM (quadrature amplitude modulation) are each individuallymapped to a particular OFDM/SC-FDM subcarrier transmitted during anOFDM/SC-FDM symbol, referred to as a resource element (RE). An RE is thesmallest physical resource in LTE. LTE also provides for MIMO(multi-input multi-output) operation where multiple layers of data aretransmitted and received by multiple antennas and where each of thecomplex modulation symbols is mapped into one of the multipletransmission layers and then mapped to a particular antenna port. EachRE is then uniquely identified by the antenna port, sub-carrierposition, and OFDM symbol index within a radio frame as explained below.

LTE transmissions in the time domain are organized into radio frames,each having a duration of 10 ms. Each radio frame consists of 10sub-frames, and each sub-frame consists of two consecutive 0.5 ms slots.Each slot comprises six indexed OFDM symbols for an extended cyclicprefix and seven indexed OFDM symbols for a normal cyclic prefix. Agroup of resource elements corresponding to twelve consecutivesubcarriers within a single slot is referred to as a resource block (RB)or, with reference to the physical layer, a physical resource block(PRB).

A UE transmits a number of control signals to the eNB, referred to asuplink control information (UCI). The current LTE standards specify thata UE transmits a hybrid automatic request repeat acknowledgement(HARQ-ACK) signal over the uplink (UL) in response to data packetreception over the downlink (DL). Depending on whether the data packetreception is correct or incorrect, the HARQ-ACK signal has an ACK or aNAK value, respectively. The UE transmits a scheduling request (SR)signal to request UL resources for signal transmission. The UE transmitschannel state information (CSI) reports that include a channel qualityindicator (CQI) signal to inform the eNB of the DL channel conditions itexperiences, enabling the eNB to perform channel-dependent scheduling ofDL data packets. The UL also transmits precoder matrix indicator/rankindicator (PMI-RI) signals as part of the CSI to inform the eNB how tocombine the transmission of a signal to the UE from multiple eNBantennas in accordance with a Multiple-Input Multiple-Output (MIMO)principle. Any of the possible combinations of HARQ-ACK, SR, CQI, PMI,and RI signals may be transmitted by a UE jointly with data informationin the physical uplink shared channel (PUSCH), or separate from datainformation in the physical uplink control channel (PUCCH).

In current LTE systems, uplink control information (UCI) such as channelstate information (CSI) or HARQ ACK/NACK feedback can be transmitted oneither the physical uplink control channel (PUCCH) or the physicaluplink shared channel (PUSCH). In the latter case, UCI needs to bemultiplexed with uplink shared channel (UL-SCH) data. In addition, eachPUSCH transmission is accompanied by demodulation reference signals(DMRS) to allow demodulation of the PUSCH symbols at the receiver. Themapping of DMRS, UCI and UL-SCH data to physical resources is tightlyinterconnected. For example, UCI transmission is generally moreprotected than data transmission as an unsuccessful UCI transmissioncould potentially trigger a downlink re-transmission or result insub-optimal adaptive modulation and coding (AMC). Hence, ACK/NACK bitsmay be mapped to resource elements (REs) in the time/frequency resourcegrid that are adjacent to DMRS as is the case in LTE.

As noted above, the uplink air interface for current LTE systems isbased on SC-FDMA. SC-FDMA waveforms exhibit several benefits foremostamong them a low peak-to-average power ratio (PAPR). Low PAPRs allow formore efficient operation of the user equipment's (UE's) power amplifier(PA). An asymmetric design, i.e., where uplink and downlink usedifferent waveforms, may no longer be justified by this improved PAefficiency, however, as the benefits of a symmetric uplink/downlink airinterface may outweigh those of SC-FDMA. For example, in current LTEsystems, a UE may need to implement both an OFDMA receiver and anSC-FDMA receiver to receive downlink transmissions from an eNB anddevice-to-device transmissions from another UE, respectively. Inaddition, for highly dynamic flexible duplex systems, i.e., wheredownlink and uplink are no longer frequency-division duplexed (FDD) inseparate bands or time-division duplexed (TDD) in separate subframes, itmay be beneficial to use symmetric DMRS patterns in either duplexdirection to allow for sophisticated, possibly network assisted,interference cancelation and mitigation schemes.

In current LTE systems, each slot of an uplink subframe contains oneSC-TDMA symbol dedicated to DMRS transmission. Let M_(sc) be thetransmission bandwidth of the physical uplink shared channel (PUSCH)which occupies N_(PRB) physical resource blocks (PRBs) in thetime/frequency resource grid of LTE, i.e., M_(sc)=12 N_(PRB). Then theUE transmits M_(sc) DMRS symbols in each slot of the PUSCH transmission.Consequently, DMRS REs and data or UCI REs never share the sameresources in the time or frequency domain: DMRS symbols are transmittedon all subcarriers of a SC-FDMA symbol carrying DMRS. The downlink DMRSpattern, on the other hand, since OFDMA does not need to maintain thesingle-carrier property of SC-FDMA, can be less restrictive so thatdata, UCI, and DMRS symbols can be multiplexed onto differentsubcarriers of a given OFDM symbol. In the downlink, however, downlinkcontrol information (DCI) is always transmitted on a dedicated physicaldownlink control channel (PDCCH) and never multiplexed onto the physicaldownlink shared channel (PDSCH). No multiplexing schemes for UCI onPUSCH with generic DMRS patterns are thus known. Hence, for a symmetricUL/DL design with OFDMA waveforms in either duplex direction, a novel REmapping scheme is needed. Moreover, the multiplexing of UCI and UL-SCHdata should preserve most of the performance benefits of SC-FDMA whileat the same time be generic enough to accommodate a vast array ofdifferent DMRS patterns.

In the embodiments described below, UCI is transmitted over anOFDMA-based uplink. In some embodiments, UCI symbols are mapped toresource elements (REs) in the time/frequency resource grid to maximizefrequency diversity. In addition, UCI can be mapped taking into accountchannel estimation performance by mapping UCI symbols to those REs thatare closest (in terms of OFDM subcarriers/symbols) to DMRS carrying REs.Mapping of UCI to REs can take into account whether an OFDM symbol alsocarries DMRS or simply UL-SCH data. Mapping of UCI to REs can also takeinto account dynamic DMRS patterns that change from subframe to subframeaccording to pre-specified rules or as indicated in the downlink controlinformation (DCI) scheduling the PUSCH associated with the DMRS. Mappingof UCI to REs may also be made to depend on the UCI payload size. Thetypes of UCI that are mentioned throughout the embodiments describedbelow (e.g., HARQ-ACK/NACK, CSI, RI, PMI, and SR) are illustrative, andother types of UCI should not be construed as precluded from thoseembodiments.

FIG. 2 shows an example of the PUSCH RE mapping for a symmetric UL/DLwaveform based on OFDMA and the LTE PUSCH RE mapping for the SC-FDMAwaveform, respectively. Now referring to the right-hand part of FIG. 2,in a legacy LTE system DMRS occupies the entire transmission bandwidthon symbol four of each slot (for normal cyclic prefix), as depicted inFIG. 2. Modulated HARQ ACK/NACK bits, if present, are then mapped intothe resources directly adjacent to the DMRS carrying SC-FDMA symbol. Thenumber of ACK/NACK information carrying symbols depends on the UE higherlayer configuration and the transmission parameters of the UL-SCH datawith which the HARQ ACK/NACK bits are multiplexed. Next, rank indicatorbits, if present, are mapped to the SC-FDMA symbol adjacent to theresources reserved for HARQ ACK/NACK transmission, as depicted in FIG.2. Lastly, channel quality indicator (CQI) bits, if present, are firstmultiplexed with the UL-SCH data and then mapped to the time/frequencyresources not yet occupied by DMRS, sounding reference signal (SRS), RI(if present) and HARQ-ACK/NACK UCI (if present).

Referring to the left-hand side of FIG. 2, for UL OFDMA waveforms theDMRS mapping may not be as regular as in the case of SC-FDMA. Forexample, UL OFDMA waveforms need not maintain the single-carrierproperty of SC-FDMA. Hence, in order to maximize spectral efficiency, aDMRS pattern for the PUSCH similar to the one in FIG. 2 may be adopted.Note, however, that the DMRS pattern depicted here merely serves as anexample and other DMRS patterns are not precluded. In addition, thenumber of sub-carriers and OFDM symbols per physical resource block(PRB) depicted in FIG. 2 also merely serve as an example. For instance,the number of OFDM symbols, may differ from the one above if the networkconfigures an extended cyclic prefix (CP). Consequently, the DMRSpattern may look different from the example one in FIG. 2.

One feature of DMRS patterns for multi-carrier modulation schemes suchas OFDMA is that for a given OFDM symbol some sub-carriers within onephysical resource block (PRB) may contain DMRS REs whereas others maynot. This cannot occur in SC-FDMA based DMRS patterns. Hence, existingrules on how to map UCI and UL-SCH data for PUSCH transmissions nolonger apply. Described herein are novel RE mapping schemes that allowto multiplex UCI and UL-SCH data within a PUSCH transmission based on ULOFDMA waveforms. Moreover, the proposed UCI mapping schemes are notstatic but rather rule based in order to facilitate dynamic adaptationof the UCI mapping in case the DMRS pattern changes, e.g., throughsubframe dependent pre-specified rules or through dynamic indication inthe downlink control information. Additionally, in some embodiments,such dynamic adaptation of the UCI mapping may also be determineddepending on the UCI payload size as is the case in self-contained framestructures or during simultaneous or subsequent transmissions of xPUSCHand xPUCCH within the same subframe.

In one embodiment, different kinds of UCI are mapped onto different OFDMsymbols. To this end, OFDM symbols within one PRB are grouped by whetherthey contain DMRS REs or not. One such example is given in FIG. 2. Inthe first slot, symbols #4 and #7 are reserved for rank indication (RI)where the symbols in each slot are numbered from 1 to 7. In the secondslot, symbols #1 and #4 are reserved for rank indication. In thisexample, the last OFDM symbol of the second slot is not includedassuming it can be used to transmit sounding reference signals (SRS).Similarly, the first symbol of the first slot is not included such thatthe total number of REs reserved for potential RI transmission is thesame as in LTE, namely, 4 M_(sc). Since the depicted DMRS pattern simplyserves as an example for ease of exposition, other time/frequencyresources for RI transmission are not precluded. Similarly, a second setof resources is reserved for HARQ ACK/NACK transmission, namely, thoseOFDM symbols which also contain DMRS REs. In the example in FIG. 2,symbols #5 and #6 are reserved in the first slot and symbols #2, #3, #5,#6 are reserved in the second slot. Symbols #2 and #3 in the first slotare not included such that the total number of REs reserved forpotential HARQ ACK/NACK transmission is the same as in LTE, namely, 4M_(sc). Since the depicted DMRS pattern simply serves as an example forease of exposition, other time/frequency resources for HARQ ACK/NACKtransmission are not precluded. In another embodiment, OFDM symbolscarrying DMRS are reserved for potential rank indication transmissionwhereas OFDM symbols not carrying DMRS are reserved for potential HARQACK/NACK feedback transmission.

In any of the embodiments described herein, CQI information may bemultiplexed with UL-SCH data prior to RE mapping. In either embodiment,UL-SCH and CQI data may be mapped first in the frequency domain, e.g.,in increasing order of the subcarrier index, and then in the timedomain, e.g., in increasing order of the OFDM symbol index.Alternatively, UL-SCH and CQI data may be mapped time-first,frequency-afterwards.

One potential drawback of frequency-first mapping for concatenatedUL-SCH and CQI data is that CQI information cannot get frequencydiversity gain in the presence of inter-slot frequency hopping. In orderto exploit frequency diversity gain provided by frequency hopping, ahybrid RE mapping method may be employed for UL-SCH and CQI datamapping. In this embodiment, CQI data is mapped first in the timedomain, e.g. in increasing order of the symbol index, and then in thefrequency domain. UL-SCH data may be mapped in frequency domain firstthen in the time domain. This structure allows for a pipelined decoderarchitecture at eNB side for data in case of frequency-first mapping,while allowing for frequency diversity for CQI information in thepresence of intra-subframe (i.e. slot-based) frequency hopping.

Assuming frequency-first mapping is applied, then in another embodiment,the CQI and UL-SCH data multiplexing is performed such that CQIinformation is first divided into multiple segments. Then, such segmentsare evenly distributed on two slots to get frequency diversity gain inthe present of frequency hopping. In this option, CQI information hasapplied to it a frequency-first mapping order as does UL-SCH data, butthe CQI is effectively mapped to predetermined resources across twoslots (e.g., a first OFDM symbol of each slot starting from lowestfrequency index) to utilize the frequency hopping benefit.

In any of the embodiments described herein, the UE determines the actualnumber of REs used for UCI transmission by a combination ofsemi-statically configured and dynamically signaled parameters,respectively. For example, the actual number of REs used for UCI withinan PUSCH allocation may depend on the UL-SCH payload, the UCI payload,the PUSCH transmission bandwidth, the SRS configuration, and/orUCI-specific offset parameters. Such parameters can be dynamicallysignaled to the UE in the downlink control information (DCI) thatcarries the UL grant for the UL-SCH data with which the UCI ismultiplexed on the PUSCH. In addition, some of these parameters may alsodepend on the UE's higher layers which the eNB can control via the radioresource control (RRC) protocol.

In any of the embodiments described herein, the UE may first map thereference signals and sounding reference signals into the time/frequencyresource grid. The UE then proceeds to map the modulated rank indicatorbits to the respective resources. This may leave some of the resourcesreserved for RI transmission unoccupied. Next, the UE maps the modulatedCQI bits to the remaining resources before it maps the modulated UL-SCHdata to the resources not already occupied by DMRS, SRS, RI, or CQI.Lastly, the UE maps the modulated HARQ ACK/NACK bits to the resourcesreserved for HARQ ACK/NACK transmission potentially puncturing CQIand/or UL-SCH symbols.

In one embodiment, the UE always maps the UCI around the DMRS REsaccording to the number of layers used for the PUSCH transmissioncarrying the UCI. Referring to the example in FIG. 3, if the number oftransmission layers is 1-4, the UE maps the UCI according to the leftDMRS patterns, otherwise, if the number of transmission layers is largerthan 4, the UE maps the UCI assuming the DMRS pattern on the right handside of FIG. 3 which only serves as an example here for ease ofexposition. In another embodiment, the UE always maps the UCI assumingthe largest possible number of transmission layers. For example, even ifthe number of actual transmission layers is less than or equal to four,the UE may still assume the DMRS pattern on the right hand side of FIG.3 when it maps the UCI.

Whenever the number of modulated UCI symbols of a specific kind (e.g.,RI or HARQ ACK/NACK) is less than the number of reserved REs for therespective kind of UCI, a RE mapping scheme is needed to map the UCI tothe reserved REs. In one embodiment, the number of modulated symbols fora specific UCI type (e.g., RI or HARQ ACK/NACK) is Q whereas the totalnumber of REs reserved for that UCI type is Q_(reserved). In order tomap the Q symbols to the Q_(reserved) resources, the REs reserved forthe UCI type (Q_(reserved) of them) are numbered in a consecutive cyclicmanner from 1 to floor (Q_(reserved)/Q) where the floor( ) operatorreturns the largest integer number smaller than or equal to the input ofthe operator. One such example is given in FIG. 4 for M_(sc)=12, Q=7 andQ_(reserved)=48 on the left hand side of the figure. In this example: 1)UCI is always mapped assuming the largest number of possibletransmission layers; 2) CQI is multiplexed with UL-SCH by first mappingthe modulated CQI bits and then the modulated UL-SCH bits in afrequency-first, time-then manner; 3) modulated RI bits are mapped toOFDM symbols not containing DMRS REs; 4) modulated HARQ-ACK bits aremapped to OFDM symbols that contain DMRS REs; 5) SRS is transmitted onthe last OFDM symbol; and,

6) the remaining REs are used to map the modulated UL-SCH bits.

FIG. 4 also depicts how the mapping rule described above is differentfrom SC-FDMA. Since the SC-FDMA waveform provides inherentfrequency-diversity from spreading each symbol over the entiretransmission bandwidth via a discrete Fourier transform (DFT) spreadingoperation, the potentially small number of RI and HARQ ACK/NACK symbolsneeds to be interleaved over the entire transmission bandwidth in thecase of OFDMA waveforms. As can be seen from the example in FIG. 4, asimple numbering of REs reserved for a certain kind of UCI may result inclusters reducing the overall frequency diversity. For the case ofM_(sc)=12, Q=7 and Q_(reserved)=48 all RI symbols, for instance, aremapped to just two sub-carriers.

In another embodiment, UCI is mapped to REs such that the clusteringdepicted in FIG. 4 cannot occur. Now focusing on the case where UCI ismapped to OFDM symbols not containing DMRS, the UE first computes a UCIstep-size according to:

${stepsize} = {\max \left\{ {{{floor}\left( \frac{Q_{reserved}}{{ceil}\left( \frac{Q}{N_{UCI}} \right)} \right)},1} \right\}}$

where the ceil( ) operator returns the smallest integer number largerthan or equal to its input and N_(UCI) is the number of OFDM symbolsreserved for UCI transmission. The i-th modulated UCI symbol (i=0, . . ., Q−1) is then mapped to the k sub-carrier within the PUSCH transmissionbandwidth on the l-th symbol according to:

l = imod N_(UCI)$k = {{{{floor}\left( \frac{i}{N_{UCI}} \right)} \cdot {stepsize}} + {\left( {{i{mod}}\ N_{UCI}} \right) \cdot {{floor}\left( \frac{stepsize}{N_{UCI}} \right)}}}$

Note that in the case where PUSCH is transmitted using frequencyhopping, the sub-carrier indexing k may differ between two slots, i.e.,k=0 may denote a different sub-carrier in the first and second slotdepending on the frequency hopping configuration of the UE. In otherwords, sub-carriers are numbered from k=0 . . . M_(sc) per slot of thePUSCH allocation.

In another embodiment, UCI is mapped to REs depending on the relativeposition to REs carrying DMRS on the same OFDM symbol, i.e., UCI of agiven type is only mapped to OFDM symbols with DMRS. In a first stage,for each OFDM symbol reserved for UCI transmission of the given type,the UE numbers all sub-carriers excluding sub-carriers containing DMRSin increasing order of the sub-carrier index by their distance (innumbers of sub-carriers) to the closest RE containing DMRS on the sameOFDM symbol. This is illustrated on the second OFDM symbol in FIG. 5 forthe exemplary DMRS pattern in FIG. 3. Note that in this case, the DMRSpattern for 1-4 layer transmissions is assumed so that UCI resourcesinclude the REs reserved for higher layer transmissions.

In another embodiment, the UE, in a first stage, numbers allsub-carriers excluding sub-carriers containing DMRS by their distance(in numbers of sub-carriers) to the closest RE containing DMRS on thesame OFDM symbol whereas the starting sub-carrier is alternated betweenOFDM symbols reserved for UCI transmission of the given type. In theexample in FIG. 5, the UE numbers the sub-carriers according to thespecified rule in increasing order of sub-carrier indices on the firstOFDM symbol reserved for UCI transmission of the given type, indecreasing order of sub-carrier indices on the second OFDM symbolreserved for UCI transmission of the given type, in increasing order ofsub-carrier indices on the third OFDM symbol reserved for UCItransmission of the given type, and so forth.

In another embodiment, the UE, in a first stage, numbers allsub-carriers excluding sub-carriers containing DMRS by their distance(in numbers of sub-carriers) to the closest RE containing DMRS on thesame OFDM symbol whereas the starting sub-carrier is alternated betweenOFDM symbols reserved for UCI transmission of the given type and betweenslots. In the example in FIG. 6, the UE numbers the sub-carriersaccording to the specified rule in increasing order of sub-carrierindices on the first OFDM symbol reserved for UCI transmission of thegiven type in the first slot, in decreasing order of sub-carrier indiceson the second OFDM symbol reserved for UCI transmission of the giventype in the first slot, in increasing order of sub-carrier indices onthe third OFDM symbol reserved for UCI transmission of the given type inthe first slot, and so forth, whereas in the second slot, the UE numbersthe sub-carriers according to the specified rule in decreasing order ofsub-carrier indices on the first OFDM symbol reserved for UCItransmission of the given type, in increasing order of sub-carrierindices on the second OFDM symbol reserved for UCI transmission of thegiven type, in decreasing order of sub-carrier indices on the third OFDMsymbol reserved for UCI transmission of the given type in the firstslot, and so forth.

In any of the embodiments described above, the UE, in a second stage,may then numbers all resource elements reserved for UCI transmission ofthe given type from m=0 . . . Q_(reserved)−1 first by the index derivedfrom the relative distance of the RE to a DMRS RE on the same symbol,then by the slot index in increasing order, and then by the OFDM symbolindex in increasing order.

In another embodiment, in the second stage, to support transmitdiversity based aperiodic UCI only transmission, in which the SpaceFrequency Block Coding (SFBC) may be used, the UE may number allresource elements reserved for UCI transmission in pairs. The numberingmay be performed as in the following method: 1) first two continuous REsby the index derived from the relative distance of the RE to a DMRS REon the same symbol, 2) then two continuous REs by the slot index inincreasing order, and 3) then two continuous REs by the OFDM symbolindex in increasing order. Lastly, in a third stage, the UE maps the Qmodulated UCI symbols (i=0, . . . , Q−1) to the Q_(reserved) REs bymapping the first modulated UCI symbol i=0 to the reserved RE indexedm=0, the second modulated UCI symbol i=1 to the reserved RE indexed m=1,the third modulated UCI symbol i=2 to the reserved RE numbered m=2, andso forth. In FIG. 7 an example is given in for the case of M_(sc)12,Q=7, Q_(reserved)=48 and N_(UCI)=4. Note that it may be possible thatthe DMRS pattern dynamically changes from subframe to subframe eitherdue to pre-specified rules or because of explicit signaling in thedownlink control information (DCI) scheduling the associated PUSCHtransmission. For example, in some subframes the DMRS pattern may shiftby P symbols to the left/right to avoid collision with othersynchronization or reference signal transmissions in the same subframe.In another example, the DMRS pattern may change because the number oftransmission layers indicated in the DCI changes from subframe tosubframe. In that case, the UCI RE mapping for UCI transmission on PUSCHdynamically adapts to the DMRS pattern in the given subframe.

In another embodiment, UCI is mapped to REs in the time/frequency gridsolely based on proximity to DMRS carrying REs without consideration ofwhether a given OFDM symbol contains DMRS REs or not. An example of sucha UCI-to-RE mapping is given in FIG. 8.

UL-SCH data and UCI may also be transmitted simultaneously in thesubframe by configuring both a dedicated PUSCH for UL-SCH data and adedicated physical uplink control channel (PUCCH) in the same subframe.In one embodiment, a PUCCH is transmitted adjacent to a PUSCH where thePUCCH and PUSCH may be frequency-division multiplexed or time-divisionmultiplexed. This may be appropriate for certain scenarios, e.g., whenCQI or CSI feedback is multiplexed together with data in the samesubframe. In this case, localized PUCCH transmission can help improvethe performance.

In another embodiment, a PUCCH is transmitted before or after the PUSCHbut within the same subframe. For example, PUCCH and PUSCH transmissionsmay be time-division multiplexed (TDM) with DMRS patterns as illustratedin FIGS. 9 through 11.

Especially for the UCI that pertains to channel state information (CSI),another option is to include the CQI and/or RI into the data packettogether with the UL-SCH bits. In one embodiment, the medium accesscontrol (MAC) header of the corresponding transport block indicateswhether CQI and/or RI are present in the payload part. CQI and/or RI maybe separately encoded and protected through cyclic redundancy check(CRC). In this option the resource mapping follows the data packet onlyand is not defined separately for data and UCI that is included in thepayload of the corresponding transport block.

In another embodiment, the mapping of UCI depends on the payload size ofsome or all UCI to be transmitted within one subframe. For example, forsubframes with both PUSCH and PUCCH transmissions from the same UE(e.g., as illustrated in FIGS. 9 through 11), HARQ ACK/NACK bits mayalways be transmitted on the PUCCH. The PUCCH resources may besemi-statically configured (i.e., certain symbols in certain subframesare always allocated for PUCCH transmissions) or dynamically signaled(e.g., via layer 1 downlink control information or layer 2 MAC controlelements). Other UCI, however, such as CSI, rank indication, ormeasurement reports, may always be transmitted on the PUSCH.

In another example, in addition to HARQ ACK/NACK bites, periodic CSI isalso always transmitted on the PUCCH irrespective of whether PUSCHtransmissions by the same UE occur within the same subframe as the PUCCHtransmission. In the case where some UCI in always transmitted on thePUCCH, an UL grant may be required for the UE to submit other UCI on thePUSCH. In the examples mentioned above, where some UCI is transmitted onthe PUSCH, such UCI may be mapped to resource elements in thetime/frequency resource grid according to the embodiments describedelsewhere in this document.

In another embodiment, all UCI is always transmitted on the PUSCH evenif the UE has a valid PUCCH resource allocation within the samesubframe. In one example, the PUSCH that carries all the UCI within agiven subframe is scheduled by an eNB. In another example, somesubframes are semi-statically configured for UCI transmission on thePUSCH. In another example, the eNB instructs the UE by means of downlinkcontrol information (DCI) whether to transmit UCI on the PUSCH or PUCCH.For example, in a subframe allocated for UCI transmission to a certainUE, if the UE receives downlink control information of one type, the UEonly transmits UL-SCH data on the PUSCH and transmits the UCI on thePUCCH. In another example, in a subframe allocated for UCI transmissionto a certain UE, if the UE receives downlink control information ofanother type, it multiplexes UL-SCH data and UCI and transmits the UCIon the PUSCH. In these examples, only some of the UCI may be transmittedon the PUSCH (with or without multiplexing the UCI with UL-SCH data)whereas other UCI is transmitted in the PUCCH. In particular, a UE mayalways transmit HARQ ACK/NACK bits on the PUCCH whereas other UCI istransmitted on the PUSCH with or without multiplexing the other UCI withUL-SCH data.

Example UE Description

As used herein, the term “circuitry” may refer to, be part of, orinclude an Application Specific Integrated Circuit (ASIC), an electroniccircuit, a processor (shared, dedicated, or group), and/or memory(shared, dedicated, or group) that execute one or more software orfirmware programs, a combinational logic circuit, and/or other suitablehardware components that provide the described functionality. In someembodiments, the circuitry may be implemented in, or functionsassociated with the circuitry may be implemented by, one or moresoftware or firmware modules. In some embodiments, circuitry may includelogic, at least partially operable in hardware.

Embodiments described herein may be implemented into a system using anysuitably configured hardware and/or software. FIG. 12 illustrates, forone embodiment, example components of a User Equipment (UE) device 100.In some embodiments, the UE device 100 may include application circuitry102, baseband circuitry 104, Radio Frequency (RF) circuitry 106,front-end module (FEM) circuitry 108 and one or more antennas 110,coupled together at least as shown.

The application circuitry 102 may include one or more applicationprocessors. For example, the application circuitry 102 may includecircuitry such as, but not limited to, one or more single-core ormulti-core processors. The processor(s) may include any combination ofgeneral-purpose processors and dedicated processors (e.g., graphicsprocessors, application processors, etc.). The processors may be coupledwith and/or may include memory/storage and may be configured to executeinstructions stored in the memory/storage to enable various applicationsand/or operating systems to run on the system.

The baseband circuitry 104 may include circuitry such as, but notlimited to, one or more single-core or multi-core processors. Thebaseband circuitry 104 may include one or more baseband processorsand/or control logic to process baseband signals received from a receivesignal path of the RF circuitry 106 and to generate baseband signals fora transmit signal path of the RF circuitry 106. Baseband processingcircuitry 104 may interface with the application circuitry 102 forgeneration and processing of the baseband signals and for controllingoperations of the RF circuitry 106. For example, in some embodiments,the baseband circuitry 104 may include a second generation (2G) basebandprocessor 104 a, third generation (3G) baseband processor 104 b, fourthgeneration (4G) baseband processor 104 c, and/or other basebandprocessor(s) 104 d for other existing generations, generations indevelopment or to be developed in the future (e.g., fifth generation(5G), 6G, etc.). The baseband circuitry 104 (e.g., one or more ofbaseband processors 104 a-d) may handle various radio control functionsthat enable communication with one or more radio networks via the RFcircuitry 106. The radio control functions may include, but are notlimited to, signal modulation/demodulation, encoding/decoding, radiofrequency shifting, etc. In some embodiments, modulation/demodulationcircuitry of the baseband circuitry 104 may include Fast-FourierTransform (FFT), precoding, and/or constellation mapping/demappingfunctionality. In some embodiments, encoding/decoding circuitry of thebaseband circuitry 104 may include convolution, tail-biting convolution,turbo, Viterbi, and/or Low Density Parity Check (LDPC) encoder/decoderfunctionality. Embodiments of modulation/demodulation andencoder/decoder functionality are not limited to these examples and mayinclude other suitable functionality in other embodiments.

In some embodiments, the baseband circuitry 104 may include elements ofa protocol stack such as, for example, elements of an evolved universalterrestrial radio access network (EUTRAN) protocol including, forexample, physical (PHY), media access control (MAC), radio link control(RLC), packet data convergence protocol (PDCP), and/or radio resourcecontrol (RRC) elements. A central processing unit (CPU) 104 e of thebaseband circuitry 104 may be configured to run elements of the protocolstack for signaling of the PHY, MAC, RLC, PDCP and/or RRC layers. Insome embodiments, the baseband circuitry may include one or more audiodigital signal processor(s) (DSP) 104 f. The audio DSP(s) 104 f may beinclude elements for compression/decompression and echo cancellation andmay include other suitable processing elements in other embodiments.Components of the baseband circuitry may be suitably combined in asingle chip, a single chipset, or disposed on a same circuit board insome embodiments. In some embodiments, some or all of the constituentcomponents of the baseband circuitry 104 and the application circuitry102 may be implemented together such as, for example, on a system on achip (SOC).

In some embodiments, the baseband circuitry 104 may provide forcommunication compatible with one or more radio technologies. Forexample, in some embodiments, the baseband circuitry 104 may supportcommunication with an evolved universal terrestrial radio access network(EUTRAN) and/or other wireless metropolitan area networks (WMAN), awireless local area network (WLAN), a wireless personal area network(WPAN). Embodiments in which the baseband circuitry 104 is configured tosupport radio communications of more than one wireless protocol may bereferred to as multi-mode baseband circuitry.

RF circuitry 106 may enable communication with wireless networks usingmodulated electromagnetic radiation through a non-solid medium. Invarious embodiments, the RF circuitry 106 may include switches, filters,amplifiers, etc. to facilitate the communication with the wirelessnetwork. RF circuitry 106 may include a receive signal path which mayinclude circuitry to down-convert RF signals received from the FEMcircuitry 108 and provide baseband signals to the baseband circuitry104. RF circuitry 106 may also include a transmit signal path which mayinclude circuitry to up-convert baseband signals provided by thebaseband circuitry 104 and provide RF output signals to the FEMcircuitry 108 for transmission.

In some embodiments, the RF circuitry 106 may include a receive signalpath and a transmit signal path. The receive signal path of the RFcircuitry 106 may include mixer circuitry 106 a, amplifier circuitry 106b and filter circuitry 106 c. The transmit signal path of the RFcircuitry 106 may include filter circuitry 106 c and mixer circuitry 106a. RF circuitry 106 may also include synthesizer circuitry 106 d forsynthesizing a frequency for use by the mixer circuitry 106 a of thereceive signal path and the transmit signal path. In some embodiments,the mixer circuitry 106 a of the receive signal path may be configuredto down-convert RF signals received from the FEM circuitry 108 based onthe synthesized frequency provided by synthesizer circuitry 106 d. Theamplifier circuitry 106 b may be configured to amplify thedown-converted signals and the filter circuitry 106 c may be a low-passfilter (LPF) or band-pass filter (BPF) configured to remove unwantedsignals from the down-converted signals to generate output basebandsignals. Output baseband signals may be provided to the basebandcircuitry 104 for further processing. In some embodiments, the outputbaseband signals may be zero-frequency baseband signals, although thisis not a requirement. In some embodiments, mixer circuitry 106 a of thereceive signal path may comprise passive mixers, although the scope ofthe embodiments is not limited in this respect.

In some embodiments, the mixer circuitry 106 a of the transmit signalpath may be configured to up-convert input baseband signals based on thesynthesized frequency provided by the synthesizer circuitry 106 d togenerate RF output signals for the FEM circuitry 108. The basebandsignals may be provided by the baseband circuitry 104 and may befiltered by filter circuitry 106 c. The filter circuitry 106 c mayinclude a low-pass filter (LPF), although the scope of the embodimentsis not limited in this respect.

In some embodiments, the mixer circuitry 106 a of the receive signalpath and the mixer circuitry 106 a of the transmit signal path mayinclude two or more mixers and may be arranged for quadraturedownconversion and/or upconversion respectively. In some embodiments,the mixer circuitry 106 a of the receive signal path and the mixercircuitry 106 a of the transmit signal path may include two or moremixers and may be arranged for image rejection (e.g., Hartley imagerejection). In some embodiments, the mixer circuitry 106 a of thereceive signal path and the mixer circuitry 106 a may be arranged fordirect downconversion and/or direct upconversion, respectively. In someembodiments, the mixer circuitry 106 a of the receive signal path andthe mixer circuitry 106 a of the transmit signal path may be configuredfor super-heterodyne operation.

In some embodiments, the output baseband signals and the input basebandsignals may be analog baseband signals, although the scope of theembodiments is not limited in this respect. In some alternateembodiments, the output baseband signals and the input baseband signalsmay be digital baseband signals. In these alternate embodiments, the RFcircuitry 106 may include analog-to-digital converter (ADC) anddigital-to-analog converter (DAC) circuitry and the baseband circuitry104 may include a digital baseband interface to communicate with the RFcircuitry 106.

In some dual-mode embodiments, a separate radio IC circuitry may beprovided for processing signals for each spectrum, although the scope ofthe embodiments is not limited in this respect.

In some embodiments, the synthesizer circuitry 106 d may be afractional-N synthesizer or a fractional N/N+1 synthesizer, although thescope of the embodiments is not limited in this respect as other typesof frequency synthesizers may be suitable. For example, synthesizercircuitry 106 d may be a delta-sigma synthesizer, a frequencymultiplier, or a synthesizer comprising a phase-locked loop with afrequency divider.

The synthesizer circuitry 106 d may be configured to synthesize anoutput frequency for use by the mixer circuitry 106 a of the RFcircuitry 106 based on a frequency input and a divider control input. Insome embodiments, the synthesizer circuitry 106 d may be a fractionalN/N+1 synthesizer.

In some embodiments, frequency input may be provided by a voltagecontrolled oscillator (VCO), although that is not a requirement. Dividercontrol input may be provided by either the baseband circuitry 104 orthe applications processor 102 depending on the desired outputfrequency. In some embodiments, a divider control input (e.g., N) may bedetermined from a look-up table based on a channel indicated by theapplications processor 102.

Synthesizer circuitry 106 d of the RF circuitry 106 may include adivider, a delay-locked loop (DLL), a multiplexer and a phaseaccumulator. In some embodiments, the divider may be a dual modulusdivider (DMD) and the phase accumulator may be a digital phaseaccumulator (DPA). In some embodiments, the DMD may be configured todivide the input signal by either N or N+1 (e.g., based on a carry out)to provide a fractional division ratio. In some example embodiments, theDLL may include a set of cascaded, tunable, delay elements, a phasedetector, a charge pump and a D-type flip-flop. In these embodiments,the delay elements may be configured to break a VCO period up into Ndequal packets of phase, where Nd is the number of delay elements in thedelay line. In this way, the DLL provides negative feedback to helpensure that the total delay through the delay line is one VCO cycle.

In some embodiments, synthesizer circuitry 106 d may be configured togenerate a carrier frequency as the output frequency, while in otherembodiments, the output frequency may be a multiple of the carrierfrequency (e.g., twice the carrier frequency, four times the carrierfrequency) and used in conjunction with quadrature generator and dividercircuitry to generate multiple signals at the carrier frequency withmultiple different phases with respect to each other. In someembodiments, the output frequency may be a LO frequency (f_(LO)). Insome embodiments, the RF circuitry 106 may include an IQ/polarconverter.

FERN circuitry 108 may include a receive signal path which may includecircuitry configured to operate on RF signals received from one or moreantennas 110, amplify the received signals and provide the amplifiedversions of the received signals to the RF circuitry 106 for furtherprocessing. FEM circuitry 108 may also include a transmit signal pathwhich may include circuitry configured to amplify signals fortransmission provided by the RF circuitry 106 for transmission by one ormore of the one or more antennas 110.

In some embodiments, the FEM circuitry 108 may include a TX/RX switch toswitch between transmit mode and receive mode operation. The FEMcircuitry may include a receive signal path and a transmit signal path.The receive signal path of the FEM circuitry may include a low-noiseamplifier (LNA) to amplify received RF signals and provide the amplifiedreceived RF signals as an output (e.g., to the RF circuitry 106). Thetransmit signal path of the FEM circuitry 108 may include a poweramplifier (PA) to amplify input RF signals (e.g., provided by RFcircuitry 106), and one or more filters to generate RF signals forsubsequent transmission (e.g., by one or more of the one or moreantennas 110.

In some embodiments, the UE device 100 may include additional elementssuch as, for example, memory/storage, display, camera, sensor, and/orinput/output (L/O) interface.

Example Machine Description

FIG. 13 illustrates a block diagram of an example machine 500 upon whichany one or more of the techniques (e.g., methodologies) discussed hereinmay perform. In alternative embodiments, the machine 500 may operate asa standalone device or may be connected (e.g., networked) to othermachines. In a networked deployment, the machine 500 may operate in thecapacity of a server machine, a client machine, or both in server-clientnetwork environments. In an example, the machine 500 may act as a peermachine in peer-to-peer (P2P) (or other distributed) networkenvironment. The machine 500 may be a user equipment (UE), evolved. NodeB (eNB), Wi-Fi access point (AP), Wi-Fi station (STA), personal computer(PC), a tablet PC, a set-top box (STB), a personal digital assistant(PDA), a mobile telephone, a smart phone, a web appliance, a networkrouter, switch or bridge, or any machine capable of executinginstructions (sequential or otherwise) that specify actions to be takenby that machine. Further, while only a single machine is illustrated,the term “machine” shall also be taken to include any collection ofmachines that individually or jointly execute a set (or multiple sets)of instructions to perform any one or more of the methodologiesdiscussed herein, such as cloud computing, software as a service (SaaS),other computer cluster configurations.

Examples, as described herein, may include, or may operate on, logic ora number of components, modules, or mechanisms. Modules are tangibleentities (e.g., hardware) capable of performing specified operations andmay be configured or arranged in a certain manner. In an example,circuits may be arranged (e.g., internally or with respect to externalentities such as other circuits) in a specified manner as a module. Inan example, the whole or part of one or more computer systems (e.g., astandalone, client or server computer system) or one or more hardwareprocessors may be configured by firmware or software (e.g.,instructions, an application portion, or an application) as a modulethat operates to perform specified operations. In an example, thesoftware may reside on a machine readable medium. In an example, thesoftware, when executed by the underlying hardware of the module, causesthe hardware to perform the specified operations.

Accordingly, the term “module” is understood to encompass a tangibleentity, be that an entity that is physically constructed, specificallyconfigured (e.g., hardwired), or temporarily (e.g., transitorily)configured (e.g., programmed) to operate in a specified manner or toperform part or all of any operation described herein. Consideringexamples in which modules are temporarily configured, each of themodules need not be instantiated at any one moment in time. For example,where the modules comprise a general-purpose hardware processorconfigured using software, the general-purpose hardware processor may beconfigured as respective different modules at different times. Softwaremay accordingly configure a hardware processor, for example, toconstitute a particular module at one instance of time and to constitutea different module at a different instance of time.

Machine (e.g., computer system) 500 may include a hardware processor 502(e.g., a central processing unit (CPU), a graphics processing unit(GPU), a hardware processor core, or any combination thereof), a mainmemory 504 and a static memory 506, some or all of which may communicatewith each other via an interlink (e.g., bus) 508. The machine 500 mayfurther include a display unit 510, an alphanumeric input device 512(e.g., a keyboard), and a user interface (UI) navigation device 514(e.g., a mouse). In an example, the display unit 510, input device 512and UI navigation device 514 may be a touch screen display. The machine500 may additionally include a storage device (e.g., drive unit) 516, asignal generation device 518 (e.g., a speaker), a network interfacedevice 520, and one or more sensors 521, such as a global positioningsystem (GPS) sensor, compass, accelerometer, or other sensor. Themachine 500 may include an output controller 528, such as a serial(e.g., universal serial bus (USB), parallel, or other wired or wireless(e.g., infrared (IR), near field communication (NFC), etc.) connectionto communicate or control one or more peripheral devices (e.g., aprinter, card reader, etc.).

The storage device 516 may include a machine readable medium 522 onwhich is stored one or more sets of data structures or instructions 524(e.g., software) embodying or utilized by any one or more of thetechniques or functions described herein. The instructions 524 may alsoreside, completely or at least partially, within the main memory 504,within static memory 506, or within the hardware processor 502 duringexecution thereof by the machine 500. In an example, one or anycombination of the hardware processor 502, the main memory 504, thestatic memory 506, or the storage device 516 may constitute machinereadable media.

While the machine readable medium 522 is illustrated as a single medium,the term “machine readable medium” may include a single medium ormultiple media (e.g., a centralized or distributed database, and/orassociated caches and servers) configured to store the one or moreinstructions 524.

The term “machine readable medium” may include any medium that iscapable of storing, encoding, or carrying instructions for execution bythe machine 500 and that cause the machine 500 to perform any one ormore of the techniques of the present disclosure, or that is capable ofstoring, encoding or carrying data structures used by or associated withsuch instructions. Non-limiting machine readable medium examples mayinclude solid-state memories, and optical and magnetic media. Specificexamples of machine readable media may include: non-volatile memory,such as semiconductor memory devices (e.g., Electrically ProgrammableRead-Only Memory (EPROM), Electrically Erasable Programmable Read-OnlyMemory (EEPROM)) and flash memory devices; magnetic disks, such asinternal hard disks and removable disks; magneto-optical disks; RandomAccess Memory (RAM); and CD-ROM and DVD-ROM disks. In some examples,machine readable media may include non-transitory machine readablemedia. In some examples, machine readable media may include machinereadable media that is not a transitory propagating signal.

The instructions 524 may further be transmitted or received over acommunications network 526 using a transmission medium via the networkinterface device 520 utilizing any one of a number of transfer protocols(e.g., frame relay, internet protocol (IP), transmission controlprotocol (TCP), user datagram protocol (UDP), hypertext transferprotocol (HTTP), etc.). Example communication networks may include alocal area network (LAN), a wide area network (WAN), a packet datanetwork (e.g., the Internet), mobile telephone networks (e.g., cellularnetworks), Plain Old Telephone (POTS) networks, and wireless datanetworks (e.g., Institute of Electrical and Electronics Engineers (IEEE)802.11 family of standards known as Wi-Fi®, FEE 802.16 family ofstandards known as WiMax®), IEEE 802.15.4 family of standards, a LongTerm Evolution (LTE) family of standards, a Universal MobileTelecommunications System (UMTS) family of standards, peer-to-peer (P2P)networks, among others. In an example, the network interface device 520may include one or more physical jacks (e.g., Ethernet, coaxial, orphone jacks) or one or more antennas to connect to the communicationsnetwork 526. In an example, the network interface device 520 may includea plurality of antennas to wirelessly communicate using at least one ofsingle-input multiple-output (SEM), multiple-input multiple-output(MIMO), or multiple-input single-output (MISO) techniques. In someexamples, the network interface device 520 may wirelessly communicateusing Multiple User MIMO techniques. The term “transmission medium”shall be taken to include any intangible medium that is capable ofstoring, encoding or carrying instructions for execution by the machine500, and includes digital or analog communications signals or otherintangible medium to facilitate communication of such software.

ADDITIONAL NOTES AND EXAMPLES

In Example 1, an apparatus for a UE (user equipment) comprises: memoryand processing circuitry; wherein the memory and processing circuitryare configured to: encode uplink control information (UCI) multiplexedwith uplink shared channel (UL-SCH) data for transmission over a sharedorthogonal frequency division multiple access (OFDMA) channel inphysical resource blocks (PRBs) of a subframe containing a plurality oftime-frequency resource elements (REs); map a first type of UCI selectedfrom hybrid automatic request repeat acknowledgement (HARQ-ACK) signalsor channel state information (CSI) signals to REs of OFDM symbols of thesubframe that also contain demodulation reference signal (DMRS) REs;and, map a second type of UCI distinct from the first type selected fromhybrid automatic request repeat acknowledgement (HARQ-ACK) signals orchannel state information (CSI) signals to REs of OFDM symbols of thesubframe that do not contain demodulation reference signal (DMRS) REs.

In Example 2, the subject matter of any of the Examples herein mayfurther include wherein the memory and processing circuitry and are tomap HARQ-ACK signals to REs of OFDM symbols of the subframe that do notcontain DMRS REs and to map rank indicator (RI) signals to REs of OFDMsymbols of the subframe that also contain DMRS REs.

In Example 3, the subject matter of any of the Examples herein mayfurther include wherein the memory and processing circuitry to mapHARQ-ACK signals to REs of OFDM symbols of the subframe that alsocontain DMRS REs and to map rank indicator (RI) signals to REs of OFDMsymbols of the subframe that do not contain DMRS REs

In Example 4, the subject matter of any of the Examples herein mayfurther include wherein the memory and processing circuitry are to mapCSI signals not mapped to REs of OFDM symbols containing DMRS REs toother REs of the subframe in accordance with their distance from DMRSREs.

In Example 5, an apparatus for a UE (user equipment) or any of theExamples herein, comprises: memory and processing circuitry; wherein thememory and processing circuitry are to: encode uplink controlinformation (UCI) multiplexed with uplink shared channel (UL-SCH) datafor transmission over a shared orthogonal frequency division multipleaccess (OFDMA) channel in physical resource blocks (PRBs) of a subframecontaining a plurality of time-frequency resource elements (REs); and,multiplex channel quality information (CQI) with UL-SCH data prior to REmapping.

In Example 6, the subject matter of any of the Examples herein mayfurther include wherein the memory and processing circuitry to map thechannel quality information (CQI) concatenated with UL-SCH data to REsof the PRB first in the frequency domain and then in the time domain.

In Example 7, the subject matter of any of the Examples herein mayfurther include wherein the memory and processing circuitry to map thechannel quality information (CQI) concatenated with UL-SCH data to REsof the PRB first in the time domain and then in the frequency domain.

In Example 8, the subject matter of any of the Examples herein mayfurther include wherein the memory and processing circuitry are to mapthe channel quality information (CQI) to REs of the PRB first in thetime domain and then in the frequency domain and to map UL-SCH data toREs of the PRB first in the frequency domain and then in the timedomain.

In Example 9, the subject matter of any of the Examples herein mayfurther include wherein the memory and processing circuitry are todivide the channel quality information (CQI) into multiple segments, tomap the CQI segments to REs of the PRB first in the frequency domain andthen in the frequency domain such that the segments are evenlydistributed across the two slots of the subframe, and to map UL-SCH datato REs of the PRB first in the frequency domain and then in the timedomain.

In Example 10, the subject matter of any of the Examples herein mayfurther include wherein the memory and processing circuitry are tomultiplex CQI with UL-SCH data by first mapping modulated CQI bits andthen modulated UL-SCH bits in a frequency-first, time-afterwards manner;map modulated rank indicator (RI) bits to OFDM symbols not containingdemodulation reference signal (DMRS) REs; map modulated HARQ-ACK bits toOFDM symbols that contain DMRS REs; map sounding reference signals (SRS)to the last OFDM symbol of the subframe; and, map modulated UL-SCH databits to remaining REs of the subframe.

In Example 11, the subject matter of any of the Examples herein mayfurther include wherein the memory and processing circuitry are to mapUCI to REs assuming a DMRS pattern corresponding to the largest possiblenumber of transmission layers.

In Example 12, an apparatus for a UE (user equipment) comprises: memoryand processing circuitry; wherein the memory and processing circuitryare configured to: encode uplink control information (UCI) multiplexedwith uplink shared channel (UL-SCH) data for transmission over a sharedorthogonal frequency division multiple access (OFDMA) channel inphysical resource blocks (PRBs) of a subframe containing a plurality oftime-frequency resource elements (REs), wherein the shared OFDMA channelincludes a physical uplink shared channel (PUSCH) and a physical uplinkcontrol channel (PUCCH); if the UE receives downlink control informationof one type, encode the UL-SCH data on the PUSCH and encode the UCI onthe PUCCH and, if the UE receives downlink control information ofanother type, encode the UL-SCH data and UCI on the PUSCH.

In Example 13, the subject matter of any of the Examples herein mayfurther include wherein the memory and processing circuitry are totime-division multiplex the PUCCH and the PUSCH.

In Example 14, the subject matter of any of the Examples herein may,further include wherein the memory and processing circuitry are tofrequency-division multiplex the PUCCH and the PUSCH.

In Example 15, the subject matter of any of the Examples herein mayfurther include wherein the memory and processing circuitry are to mapHARQ ACK/NACK bits to the PUCCH and map other UCI to the PUSCH.

In Example 16, a computer-readable medium comprises instructions tocause a user equipment (UE), upon execution of the instructions byprocessing circuitry of the UE, to perform any of the functions of thememory processing circuitry as recited in Examples 1 through 15.

In Example 17, a method for operating a UE comprises performing any ofthe functions of the memory and processing circuitry and transceiver asrecited in any of Examples 1 through 15.

In Example 18, an apparatus for a UE comprises means for performing anyof the functions of the memory and processing circuitry and transceiveras recited in any of Examples 1 through 15.

In Example 19, the subject matter of any of the Examples herein mayfurther include a radio transceiver connected to the memory andprocessing circuitry.

In Example 20, the subject matter of any of the Examples herein mayfurther include wherein the processing circuitry comprises a basebandprocessor.

The above detailed description includes references to the accompanyingdrawings, which form a part of the detailed description. The drawingsshow, by way of illustration, specific embodiments that may bepracticed. These embodiments are also referred to herein as “examples.”Such examples may include elements in addition to those shown ordescribed. However, also contemplated are examples that include theelements shown or described. Moreover, also contemplate are examplesusing any combination or permutation of those elements shown ordescribed (or one or more aspects thereof), either with respect to aparticular example (or one or more aspects thereof), or with respect toother examples (or one or more aspects thereof) shown or describedherein.

Publications, patents, and patent documents referred to in this documentare incorporated by reference herein in their entirety, as thoughindividually incorporated by reference. In the event of inconsistentusages between this document and those documents so incorporated byreference, the usage in the incorporated reference(s) are supplementaryto that of this document; for irreconcilable inconsistencies, the usagein this document controls.

In this document, the terms “a” or “an” are used, as is common in patentdocuments, to include one or more than one, independent of any otherinstances or usages of “at least one” or “one or more.” In thisdocument, the term “or” is used to refer to a nonexclusive or, such that“A or B” includes “A but not B,” “B but not A,” and “A and B,” unlessotherwise indicated. In the appended claims, the terms “including” and“in which” are used as the plain-English equivalents of the respectiveterms “comprising” and “wherein.” Also, in the following claims, theterms “including” and “comprising” are open-ended, that is, a system,device, article, or process that includes elements in addition to thoselisted after such a term in a claim are still deemed to fall within thescope of that claim. Moreover, in the following claims, the terms“first,” “second,” and “third,” etc. are used merely as labels, and arenot intended to suggest a numerical order for their objects.

The embodiments as described above may be implemented in varioushardware configurations that may include a processor for executinginstructions that perform the techniques described. Such instructionsmay be contained in a machine-readable medium such as a suitable storagemedium or a memory or other processor-executable medium.

The embodiments as described herein may be implemented in a number ofenvironments such as part of a wireless local area network (WLAN), 3rdGeneration Partnership Project (3GPP) Universal Terrestrial Radio AccessNetwork (UTRAN), or Long-Term-Evolution (LTE) or a Long-Term-Evolution(LTE) communication system, although the scope of the invention is notlimited in this respect. An example LTE system includes a number ofmobile stations, defined by the LTE specification as User Equipment(UE), communicating with a base station, defined by the LTEspecifications as an eNB.

Antennas referred to herein may comprise one or more directional oromnidirectional antennas, including, for example, dipole antennas,monopole antennas, patch antennas, loop antennas, microstrip antennas orother types of antennas suitable for transmission of RF signals. In someembodiments, instead of two or more antennas, a single antenna withmultiple apertures may be used. In these embodiments, each aperture maybe considered a separate antenna. In some multiple-input multiple-output(MIMO) embodiments, antennas may be effectively separated to takeadvantage of spatial diversity and the different channel characteristicsthat may result between each of antennas and the antennas of atransmitting station. In some MIMO embodiments, antennas may beseparated by up to 1/10 of a wavelength or more.

In some embodiments, a receiver as described herein may be configured toreceive signals in accordance with specific communication standards,such as the Institute of Electrical and Electronics Engineers (IEEE)standards including IEEE 802.11 standards and/or proposed specificationsfor WLANs, although the scope of the invention is not limited in thisrespect as they may also be suitable to transmit and/or receivecommunications in accordance with other techniques and standards. Insome embodiments, the receiver may be configured to receive signals inaccordance with the IEEE 802.16-2004, the IEEE 802.16(e) and/or IEEE802.16(m) standards for wireless metropolitan area networks (WMANs)including variations and evolutions thereof, although the scope of theinvention is not limited in this respect as they may also be suitable totransmit and/or receive communications in accordance with othertechniques and standards. In some embodiments, the receiver may beconfigured to receive signals in accordance with the UniversalTerrestrial Radio Access Network (UTRAN) LTE communication standards.For more information with respect to the IEEE 802.11 and IEEE 802.16standards, please refer to “IEEE Standards for InformationTechnology—Telecommunications and Information Exchange betweenSystems”—Local Area Networks—Specific Requirements—Part 11 “Wireless LANMedium Access Control (MAC) and Physical Layer (PHY), ISO/IEC 8802-11:1999”, and Metropolitan Area Networks—Specific Requirements—Part 16:“Air Interface for Fixed Broadband Wireless Access Systems,” May 2005and related amendments/versions. For more information with respect toUTRAN LTE standards, see the 3rd Generation Partnership Project (3GPP)standards for UTRAN-LTE, including variations and evolutions thereof.

The above description is intended to be illustrative, and notrestrictive. For example, the above-described examples (or one or moreaspects thereof) may be used in combination with others. Otherembodiments may be used, such as by one of ordinary skill in the artupon reviewing the above description. The Abstract is to allow thereader to quickly ascertain the nature of the technical disclosure. Itis submitted with the understanding that it will not be used tointerpret or limit the scope or meaning of the claims. Also, in theabove Detailed Description, various features may be grouped together tostreamline the disclosure. However, the claims may not set forth everyfeature disclosed herein as embodiments may feature a subset of saidfeatures. Further, embodiments may include fewer features than thosedisclosed in a particular example. Thus, the following claims are herebyincorporated into the Detailed Description, with a claim standing on itsown as a separate embodiment. The scope of the embodiments disclosedherein is to be determined with reference to the appended claims, alongwith the full scope of equivalents to which such claims are entitled.

1. (canceled)
 2. An apparatus comprising: at least one processorconfigured to cause a UE (user equipment) to: decode downlink controlinformation (DCI) scheduling an uplink shared channel (UL-SCH) datatransmission; multiplex uplink control information (UCI) with the UL-SCHdata for transmission over orthogonal frequency division multiplexing(OFDM) symbols in the time domain and in one or more physical resourceblocks (PRBs) in the frequency domain, wherein the OFDM symbols and theone or more PRBs include a plurality of time-frequency resource elements(REs); map demodulation reference signals (DMRS) to REs in a set of OFDMsymbols of the transmission, wherein the set of OFDM symbols isdetermined according to the DCI; map UCI to REs of the OFDM symbols,wherein the mapping of UCI dynamically adapts to the position of theDMRS REs as determined according to the DCI, wherein said mappingincludes mapping the UCI to REs first in the frequency domain and thenin the time domain; and map UL-SCH data to REs of the one or more PRBsfirst in the frequency domain and then in the time domain after mappingthe UCI.
 3. The apparatus of claim 2, wherein the UL-SCH data is mappedto REs on OFDM symbols that include DMRS REs.
 4. The apparatus of claim3, wherein the UCI is mapped to REs of OFDM symbols that do not includeDMRS REs.
 5. The apparatus of claim 2, wherein the at least oneprocessor is further configured to cause the UE to: divide channelquality information (CQI) bits into multiple segments when the UCIincludes CQI bits.
 6. The apparatus of claim 5, wherein the at least oneprocessor is further configured to cause the UE to: map the multiplesegments to REs of OFDM symbols that do not include DMRS REs startingwith the first OFDM symbol of the transmission not including DMRS REs.7. The apparatus of claim 2, wherein the transmission includes at leastone set of two consecutive OFDM symbols including DMRS.
 8. The apparatusof claim 2, wherein the transmission is mapped to two slots, and whereinthe multiple segments are both mapped evenly to the two slots.
 9. Theapparatus of claim 8, wherein a set of HARQ-ACK bits are mapped to REsreserved for HARQ-ACK bits after the mapping of the UL-SCH data.
 10. Theapparatus of claim 2, wherein the at least one processor comprises abaseband processor configured to decode the DCI.
 11. The apparatus ofclaim 2, wherein the apparatus further comprises wireless communicationcircuitry configured to receive the DCI.
 12. A wireless device,comprising: wireless communication circuitry; and at least one processorcoupled to the wireless communication circuitry and configured to:decode downlink control information (DCI) scheduling an uplink sharedchannel (UL-SCH) data transmission; multiplex uplink control information(UCI) with the UL-SCH data for transmission over orthogonal frequencydivision multiplexing (OFDM) symbols in the time domain and in one ormore physical resource blocks (PRBs) in the frequency domain, whereinthe OFDM symbols and the one or more PRBs include a plurality oftime-frequency resource elements (REs); map demodulation referencesignals (DMRS) to REs in a set of OFDM symbols of the transmission,wherein the set of OFDM symbols is determined according to the DCI; mapUCI to REs of the OFDM symbols, wherein said mapping of UCI dynamicallyadapts to the position of the DMRS REs as determined according to theDCI, wherein said mapping includes mapping the UCI to REs first in thefrequency domain and then in the time domain; and map UL-SCH data to REsof the one or more PRBs first in the frequency domain and then in thetime domain after mapping the UCI.
 13. The wireless device of claim 12,wherein the UL-SCH data is mapped to REs on OFDM symbols that includeDMRS REs.
 14. The wireless device of claim 13, wherein the UCI is mappedto REs of OFDM symbols that do not include DMRS REs.
 15. The wirelessdevice of claim 12, wherein the at least one processor is furtherconfigured to: divide channel quality information (CQI) bits intomultiple segments when the UCI includes CQI bits.
 16. The wirelessdevice of claim 15, wherein the at least one processor is furtherconfigured to: map the multiple segments to REs of OFDM symbols that donot include DMRS REs starting with the first OFDM symbol of thetransmission not including DMRS REs.
 17. The wireless device of claim12, wherein the transmission is mapped to two slots, and wherein themultiple segments are both mapped evenly to the two slots.
 18. A methodof operating a base station comprising: encoding, for transmission to auser equipment (UE), downlink control information (DCI) scheduling anuplink shared channel (UL-SCH) data transmission; extracting, inresponse to the DCI, uplink control information (UCI) multiplexed withthe UL-SCH data from orthogonal frequency division multiplexing (OFDM)symbols in the time domain and in one or more physical resource blocks(PRBs) in the frequency domain, wherein the OFDM symbols and the one ormore PRBs include a plurality of time-frequency resource elements (REs);wherein the transmission includes: demodulation reference signals (DMRS)mapped to REs in a set of OFDM symbols of the transmission, wherein theset of OFDM symbols is based on the DCI; UCI mapped to REs of the OFDMsymbols, wherein said mapping of UCI dynamically adapts to the positionof the DMRS REs as determined according to the DCI; wherein the mappingincludes UCI mapped to REs first in the frequency domain and then in thetime domain; and UL-SCH data mapped to REs of the one or more PRBs firstin the frequency domain and then in the time domain after mapping theUCI.
 19. The method of claim 18, wherein the UL-SCH data is mapped toREs on OFDM symbols that include DMRS REs.
 20. The method of claim 18,wherein the transmission is mapped to two slots, and wherein themultiple segments are both mapped evenly to the two slots.
 21. Themethod of claim 19, wherein the UCI is mapped to REs of OFDM symbolsthat do not include DMRS REs.